These relatively simple additions and customizations meet all our requirements. As with other aspects of Plone, the less you need to deviate from the out-of-the-box configuration, the better. However, there are times when you need a bit more power.
At the root of every Zope instance, there is a user folder, called
acl_users. User folders provide functionality for authenticating, authorizing, finding, and inspecting users. The user folder in the Zope application root typically contains only the main administrator user. There is a more specific user folder inside each Plone site, also called
acl_users, which manages regular users.
Since Plone 2.5, user folders are powered by